Gaya APA

[et.al.], H, G. (2013). Levels, sources and risk assessment of trace elements in wetland soils of a typical shallow freshwater lake, China . : Springer-Verlag.

Gaya MLA

[et.al.], Haifeng, Gao. "Levels, sources and risk assessment of trace elements in wetland soils of a typical shallow freshwater lake, China". : Springer-Verlag, 2013. e-journal.